YOU SAID:
You could have been a better person than what you were
INTO JAPANESE
あなたは今よりも良い人だったかもしれない
BACK INTO ENGLISH
you could have been a better person than you are now
INTO JAPANESE
あなたは今よりも良い人だったかもしれない
BACK INTO ENGLISH
you could have been a better person than you are now
That didn't even make that much sense in English.